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High-quality-factor low-dielectric-constant microwave dielectric ceramic BaLiBiW2O9
The invention discloses a low-temperature-sintering stable-temperature low-dielectric-constant microwave dielectric ceramic BaLiBiW2O9 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and proportioning BaCO3, Li2CO3, Bi2O3 and WO3 original powders with the purity of higher than 99.9 wt% according to the composition of the BaLiBiW2O9; (2) carrying out wet ball milling mixing on the raw materials in the step (1) for 12 hours by using distilled water as a ball milling medium, drying, and presintering in a 750 DEG C atmospheric atmosphere for 6 hours; and (3) adding an adhesive into the powder prepared in the step (2), granulating, compacting, and finally, sintering in an 800-850 DEG C atmospheric atmosphere for 4 hours, wherein the adhesive adopts a 5 wt% polyvinyl alcohol solution, and the addition amount of the polyvinyl alcohol is 3% of the total mass of the powder. The ceramic has favorable sintering property at 850 DEG C below, the dielectric constant reaches 29.1-29.7, the quality factor Qf value is up to 83000-112000 GHz, the temperature coefficient of resonance frequency is small, and the ceramic has great application value in industry.
High-quality-factor low-dielectric-constant microwave dielectric ceramic BaLiBiW2O9
The invention discloses a low-temperature-sintering stable-temperature low-dielectric-constant microwave dielectric ceramic BaLiBiW2O9 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and proportioning BaCO3, Li2CO3, Bi2O3 and WO3 original powders with the purity of higher than 99.9 wt% according to the composition of the BaLiBiW2O9; (2) carrying out wet ball milling mixing on the raw materials in the step (1) for 12 hours by using distilled water as a ball milling medium, drying, and presintering in a 750 DEG C atmospheric atmosphere for 6 hours; and (3) adding an adhesive into the powder prepared in the step (2), granulating, compacting, and finally, sintering in an 800-850 DEG C atmospheric atmosphere for 4 hours, wherein the adhesive adopts a 5 wt% polyvinyl alcohol solution, and the addition amount of the polyvinyl alcohol is 3% of the total mass of the powder. The ceramic has favorable sintering property at 850 DEG C below, the dielectric constant reaches 29.1-29.7, the quality factor Qf value is up to 83000-112000 GHz, the temperature coefficient of resonance frequency is small, and the ceramic has great application value in industry.
High-quality-factor low-dielectric-constant microwave dielectric ceramic BaLiBiW2O9
XIANG HUAICHENG (Autor:in) / TANG YING (Autor:in) / WANG DAN (Autor:in)
09.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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